A container config debugger in Ruby and Sinatra

debugger.rb

# A utility app to debug the Docker on AWS.
#

require 'sinatra'
require 'active_record'
require 'redis'

configure do
  use Rack::CommonLogger, $STDOUT
end

get '/db' do
  # Uses DATABASE_URL by default
  ActiveRecord::Base.establish_connection
  $db = ActiveRecord::Base.connection
  erb :db
end

# Careful, this exposes secrets by dumping the env
# get '/env' do
#   erb :env
# end

get '/redis' do
  redis = Redis.new(url: ENV['REDIS_URL'])
  redis.echo('Redis is OK')
end

get '/error' do
  raise 'Boom'
end

get '/ruby-version' do
  ENV['RUBY_VERSION']
end

# Catchall route
get '/*' do
  'Pong'
end

__END__

@@ db
DB Connection Test
<%= $db.execute('SELECT COUNT(*) pages').first  %>

@@ env
<table>
  <% ENV.each do |k, v| %>
    <tr>
      <td><%= k %></td>
      <td><%= v %></td>
    </tr>
  <% end %>
</table>